debian 12 can not change core file size

I have this in my /etc/security/limits.conf:

*                soft    core            unlimited
*                hard    core            unlimited

And no other files in /etc/security/limits.d. Added session required pam_limits.so in /etc/pam.d/common-session and /etc/pam.d/common-session-noninteractive. After re-login and reboot, the output of ulimit -c is always 0. But ulimit -c 100000 or ulimit -c unlimited works.（I don't want to use this ad hoc approach.）